Malicious PDF — malware analysis report

Static analysis result for SHA-256 0413f386908898b0…

MALICIOUS

PDF

76.9 KB Created: 2020-12-21 05:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5123020b7dca945a129b75d97aec3980 SHA-1: dcd7b6a3544f2d9019c66b3f19fda5510f2c7b0a SHA-256: 0413f386908898b0e16e13d9b5b4190334b85f9cc392873e1608aa0152a0c4de
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/aws?utm_term=bnmu+part+2+result+2019+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fd679dd07aa5.pdfIn PDF document text
    • https://wosefekolejareb.weebly.com/uploads/1/3/4/3/134340916/maredoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_5fb41a7aba6ba.pdfIn PDF document text
    • https://doliwejivus.weebly.com/uploads/1/3/4/3/134353379/5497329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5fc188a42d957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445555/normal_5fde5b059a5c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f92736d83dce.pdfIn PDF document text
    • https://moniraje.weebly.com/uploads/1/3/1/4/131438162/jizik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/voropa/rocket_thrust.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/90493776954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9309d4b5-118a-47bc-ae3b-e24ff5928608/69085403547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/320032f3-4306-4b91-90a1-61df00ca7194/top_body_menu_fichier.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/diwali_background_hd_png.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/languages_by_carl_sandburg_date.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/richard_wagner_bridal_chorus_sheet_music.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC994 5720 bytes
SHA-256: ba3d5b81b12678db3116dad36a7f93232dbdfa01b62531ccf1e3d5bc3bf6c752
font_01_sfnt_off0000dcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEC 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000e84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84F 10096 bytes
SHA-256: b457f1a5f11c708ae3fe07944bbb431cfb07b5b7da0049bab9742a290e405e56
font_03_sfnt_off00010b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B42 8244 bytes
SHA-256: 1cb6aa5708139aa851d9938165a591f1778d8a44530db8fdedce16a5c84224c5

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